Download Aptitude Crack
img not found img not found

Mass Transfer

Q1: If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

A 0

B 1

C <1

D >1

ANS:B - 1

The Lewis number (𝐿𝑒Le) is a dimensionless parameter that relates the thermal diffusivity (𝐷𝑇DT​) to the mass diffusivity (𝐷𝑚Dm​) in a fluid mixture. It is defined as: 𝐿𝑒=𝐷𝑇𝐷𝑚Le=Dm​DT​​ If the mass diffusivity in a mixture is equal to the thermal diffusivity, then 𝐿𝑒Le would be equal to 1. So, the correct answer is: 𝐿𝑒=1Le=1



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.